There are moments in Jeff Lipsky’s low-budget, high-octane battle of the sexes, when Stuart (Justin Kirk), a reflexively nasty Jewish publicity agent, and Nicole (Julianne Nicholson), the testy, freckle-faced Catholic girl he marries, dredge up a grubby intimacy that most relationship dramas avoid: financial anxieties, clashing timetables for having babies, and so forth. Yet the hero remains such an exhibitionistically cocky, walled-off jerk that Flannel Pajamas‘ glib conversational ”candor” yields no mystery. And that’s a problem in two hours of talk.